Bill Farner created AURORA-868:
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Summary: Decouple initial scheduling delay from first scheduling
penalty
Key: AURORA-868
URL: https://issues.apache.org/jira/browse/AURORA-868
Project: Aurora
Issue Type: Task
Components: Scheduler
Reporter: Bill Farner
When the scheduler inserts a task into the scheduling queue, it uses a
{{BackoffStrategy}} to calculate the initial penalty. The initial value is
tied to {{-initial_schedule_delay}}.
Based on data collected from https://reviews.apache.org/r/25872/, it's clear
that the backoff is not aggressive enough - it is rare that we find a match for
tasks within O(seconds) if we did not immediately find a match.
I suggest we continue to try very quickly to schedule newly-pending tasks, but
apply harsher penalties when a match cannot be found. This would translate
into 0 initial penalty when first inserted, and perhaps a new
{{-initial_schedule_delay}} default of 1 second, and a {{-max_schedule_delay}}
of 1 minute.
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